00:00:00 June 22----- 23:59:59 June 27 【GMT】
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screen shot from the game about the activity (players can find it) :
Finally guys i found their FaceBook page :
https://www.facebook.com/pages/Grand...82311791908251
Game download link :
https://play.google.com/store/apps/d...game.war&hl=en